支持系统和机型:
iOS系统的指纹识别功能最低支持的机型为 iPhone 5s
,最低支持系统为 iOS 8
,
虽然安装 iOS 7系统的5s
机型可以使用系统提供的指纹解锁功能,但由于 API
并未开放,所以理论上第三方软件不可使用。
LocalAuthentication.framework #import <LocalAuthentication/LocalAuthentication.h>
做 iOS 8以下
版本适配时,务必进行 API验证
,避免调用相关API引起崩溃。
if(iOS8){xxx} // 系统版本验证 if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError])
LAContext
指纹验证操作对象
1 #import "ViewController.h" 2 #import "MBProgressHUD+MJ.h" 3 #import <LocalAuthentication/LocalAuthentication.h> 4 5 #define iOS8 ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) 6 7 8 @interface ViewController () 9 - (IBAction)clickMethod:(id)sender; 10 11 @end 12 13 @implementation ViewController 14 15 - (void)viewDidLoad { 16 [super viewDidLoad]; 17 // Do any additional setup after loading the view, typically from a nib. 18 } 19 20 21 - (IBAction)clickMethod:(id)sender { 22 23 if (!iOS8) { // iOS8以后支持 touchID 24 // HUD 提示 25 [MBProgressHUD showError:@"当前系统不支持touchID"]; 26 return; 27 } 28 29 // 调用touchID 30 [self touchIDShow]; 31 32 } 33 34 - (void)touchIDShow 35 { 36 // 创建指纹校验对象 37 LAContext *context = [[LAContext alloc] init]; 38 39 NSError *error1 = nil; 40 if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error1]) { 41 // 弹出验证 42 [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"touchID error" reply:^(BOOL success, NSError * _Nullable error) { 43 44 if (success) { // 验证成功 45 NSLog(@"success"); 46 }else{ 47 switch (error.code) { 48 case LAErrorSystemCancel: 49 { 50 NSLog(@"Authentication was cancelled by the system"); 51 //切换到其他APP,系统取消验证Touch ID 52 break; 53 } 54 case LAErrorUserCancel: 55 { 56 NSLog(@"Authentication was cancelled by the user"); 57 //用户取消验证Touch ID 58 break; 59 } 60 case LAErrorUserFallback: 61 { 62 NSLog(@"User selected to enter custom password"); 63 [[NSOperationQueue mainQueue] addOperationWithBlock:^{ 64 //用户选择输入密码,切换主线程处理 65 }]; 66 break; 67 } 68 default: 69 { 70 [[NSOperationQueue mainQueue] addOperationWithBlock:^{ 71 //其他情况,切换主线程处理 72 }]; 73 break; 74 } 75 } 76 NSLog(@"/n%s/n ---line=%d/n -- error=%@/n", __FUNCTION__, __LINE__, error.localizedDescription); 77 } 78 }]; 79 80 }else{ 81 switch (error1.code) { 82 case LAErrorTouchIDNotEnrolled: 83 NSLog(@"LAErrorTouchIDNotEnrolled"); 84 break; 85 86 87 case LAErrorPasscodeNotSet: 88 NSLog(@"LAErrorPasscodeNotSet"); // 此处触发showPasscodeResetAlert方法 89 break; 90 91 default: 92 NSLog(@"Touch ID is unaviliable"); 93 break; 94 } 95 } 96 /* 97 typedef NS_ENUM(NSInteger, LAError) 98 { 99 //授权失败 100 LAErrorAuthenticationFailed = kLAErrorAuthenticationFailed, 101 102 //用户取消Touch ID授权 103 LAErrorUserCancel = kLAErrorUserCancel, 104 105 //用户选择输入密码 106 LAErrorUserFallback = kLAErrorUserFallback, 107 108 //系统取消授权(例如其他APP切入) 109 LAErrorSystemCancel = kLAErrorSystemCancel, 110 111 //系统未设置密码 112 LAErrorPasscodeNotSet = kLAErrorPasscodeNotSet, 113 114 //设备Touch ID不可用,例如未打开 115 LAErrorTouchIDNotAvailable = kLAErrorTouchIDNotAvailable, 116 117 //设备Touch ID不可用,用户未录入 118 LAErrorTouchIDNotEnrolled = kLAErrorTouchIDNotEnrolled, 119 } NS_ENUM_AVAILABLE(10_10, 8_0); 120 121 */ 122 123 [self dealWithError:error1]; 124 } 125 126 127 - (void)dealWithError:(NSError *)error 128 { 129 if (error) { 130 NSLog(@"error = %@", error.localizedDescription); 131 } 132 } 133 @end